| 1 | /* Syntactic analyzer */ |
| 2 | |
| 3 | #include <stdbool.h> |
| 4 | #include <stdarg.h> |
| 5 | |
| 6 | #include "global_vars.h" |
| 7 | #include "lexical_analyzer.h" |
| 8 | |
| 9 | /* Syntactic analyzer functions implementation */ |
| 10 | |
| 11 | enum TokenType tokenType; |
| 12 | |
| 13 | static bool analyze_TEXT() { |
| 14 | bool rtval = true; |
| 15 | if (tokenType == MOT) { |
| 16 | scanner(); |
| 17 | rtval = analyze_TEXT(); |
| 18 | } else if (tokenType != MOTCLE && tokenType != NPARA && tokenType != SECTION && \ |
| 19 | tokenType != SSECTION && tokenType != FIN) { |
| 20 | rtval = false; |
| 21 | } |
| 22 | return rtval; |
| 23 | } |
| 24 | |
| 25 | static bool analyze_P() { |
| 26 | bool rtval = true; |
| 27 | if (tokenType == NPARA) { |
| 28 | scanner(); |
| 29 | if (tokenType == MOT) { |
| 30 | scanner(); |
| 31 | rtval = analyze_TEXT(); |
| 32 | rtval = analyze_P(); |
| 33 | } |
| 34 | } else if (tokenType != SECTION && tokenType != SSECTION && tokenType != FIN) { |
| 35 | rtval = false; |
| 36 | } |
| 37 | return rtval; |
| 38 | } |
| 39 | |
| 40 | static bool analyze_HEAD() { |
| 41 | bool rtval = true; |
| 42 | if (tokenType == MOTCLE) { |
| 43 | scanner(); |
| 44 | rtval = analyze_TEXT(); |
| 45 | if (tokenType == MOTCLE) { |
| 46 | scanner(); |
| 47 | rtval = analyze_TEXT(); |
| 48 | } else { |
| 49 | rtval = false; |
| 50 | } |
| 51 | } else { |
| 52 | rtval = false; |
| 53 | } |
| 54 | return rtval; |
| 55 | } |
| 56 | |
| 57 | static bool analyze_H1() { |
| 58 | bool rtval = true; |
| 59 | if (tokenType == SECTION) { |
| 60 | scanner(); |
| 61 | rtval = analyze_TEXT(); |
| 62 | } else { |
| 63 | rtval = false; |
| 64 | } |
| 65 | return rtval; |
| 66 | } |
| 67 | |
| 68 | static bool analyze_H2() { |
| 69 | bool rtval = true; |
| 70 | if (tokenType == SSECTION) { |
| 71 | scanner(); |
| 72 | rtval = analyze_TEXT(); |
| 73 | } else { |
| 74 | rtval = false; |
| 75 | } |
| 76 | return rtval; |
| 77 | } |
| 78 | |
| 79 | static bool analyze_S2() { |
| 80 | bool rtval = true; |
| 81 | if (analyze_H2()) { |
| 82 | rtval = analyze_P(); |
| 83 | rtval = analyze_S2(); |
| 84 | } else if (tokenType != SECTION && tokenType != FIN) { |
| 85 | rtval = false; |
| 86 | } else { |
| 87 | rtval = false; |
| 88 | } |
| 89 | return rtval; |
| 90 | } |
| 91 | |
| 92 | static bool analyze_S1() { |
| 93 | bool rtval = true; |
| 94 | if (analyze_H1()) { |
| 95 | rtval = analyze_P(); |
| 96 | rtval = analyze_S2(); |
| 97 | rtval = analyze_S1(); |
| 98 | } else if (tokenType != FIN) { |
| 99 | rtval = false; |
| 100 | } else { |
| 101 | rtval = false; |
| 102 | } |
| 103 | return rtval; |
| 104 | } |
| 105 | |
| 106 | static bool analyze_BODY() { |
| 107 | bool rtval = true; |
| 108 | rtval = analyze_P(); |
| 109 | rtval = analyze_S1(); |
| 110 | return rtval; |
| 111 | } |
| 112 | |
| 113 | bool analyze_AXIOME() { |
| 114 | bool rtval = true; |
| 115 | scanner(); |
| 116 | rtval = analyze_HEAD(); |
| 117 | rtval = analyze_BODY(); |
| 118 | if (tokenType != FIN) { |
| 119 | rtval = false; |
| 120 | } |
| 121 | return rtval; |
| 122 | } |